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Its Principal Ore Is Columbite Crossword Clue

There is 1 exact and 143 possible answers.
We've checked our database and believe the answer is NIOBIUM which was last seen in the New York Times crossword.
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We think the answer to this crossword clue is: NIOBIUM

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99%7Exact Match!
noun

• a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium

33%9 Commonly found in minerals such as columbite and pyrochlore
noun

• a former name for niobium

33%7 Variety of the mineral columbite
noun

• a black mineral that is an ore of niobium and tantalum

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Clue Last Found In...

Source #Number Answer
New York Times01 Oct 1999 Down 31
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